Tripping mechanism for scoops



Aug. 3 1926.

G. B. SCOTT TRIPPING MECHANISM FOR SCOOPS Wvzvrae: 60v 5 .icarr 3 Sheets-Sheet '1 Filed May 11, 1925 3 Sheets-Sheet 3 I; WVENTOE" iii: 556077 Tale/v57 G. B. SCOTT TRIPPING MECHANISM FOR SCOOPS Flled May 11 125 Aug. 3,1926. f 1,594,566

G. B. SCOTT TRIPPING MECHANISM FOR SCOOPS ATTORNEY Patented Aug 3, i926, v i v V GU! Bl SCOTT F PAINESVILLE, OHIQ, ASSIGNOR 0E ONE-MAKE TU ELMER FRESH- WATER, GE PAINESVILLE, QHIO. v

TRIPPHWG MEGEIANISM ZFQR SGQQP$.

Application filed may Ill, limit. Serial it'o. will? My invention relates to tripping mechaand elements associated therewith to form nism and particularly to mechanism of this the type of scoop latch tripping mechanism to character adapted for use with power exshown in Figure l; cavators. The invention is utilized for trip- Figure 4 is a side elevation, upon an en t ping the latch controlling the discharge door larged scale, of a swivel pulley and a hanger of the excavator scoop. The object of the therefor depending from the excavator pla invention is to provide simple and convenform, and utilized for a purpose hereinafter t0 iently-actuated mechanism of this character fully explained; by which the door latch of the scoop may Figure 5 is a side elevation of a second and be controlled by the operator of the excapreterred form ot' scoop latch tripping mechrating machine, Without the necessity of emanism, the same being'shown in association ploying an additional man for performing With one of the scoop-control levers ot a thisduty. More particularly, the invention standard form of power excavator; relates to such mechanism in Which the Figure 6 is a tront elevation, upon an on means-controlling the trip are connected to larged scale, oi a multiple-pulley hloclr utione of the control levers tor the main scooplized for a purpose hereinafter fully actuating mechanism so that such trip conplained; trolling means is a part of a unitary device Figure 2 is a vertical transverse section, including such scoop-control lever. It is intaken in the plane indicated, by the line all tended that the trip controlling means shall VH -VH, Figure 6; be actuated by the same hand of the opera- Figure 8 is a horizontal section, taken in tor as actuates the SCOOP-GOIll'II'Ol lQVGT. The the plane indicated toy the line jlflll flll,

trip controlling means have a selective Figure 6; and limited movement independent of the scoop- Figure 9 is a fragmentary side elevation control lever, or may he looked to the lastot a conventional type of scoop excavator mentioned lever so as to move therewith. provided with the preferred ctorrn ct scoop the latterevent, the movement of the scooplatch tripping mechanism shown .Tiigure 5. control lever and the tri control has no iieterring particularly the annexed i 'ect upon the scoop Fetch controlling drawings, in the several views oi which the diilerent elements are respectively designated means.

'lhe annexed drawings and the following by the same ordinals, l sugoest a standard description set forth in detail certain means form of power scoop-excavating machine hy embodying my invention, such means son a platform 5, a swinging looom ti which is stituting, however, but one of the various supported at one end hy means of a horizon iorn'is in which the principle ofthe invental pin upon a boom support ti l pivotally Mm t b h d, mounted by means of vertical hing-pins (not i n said annexed drawings: shown} upon forwardly projecting shoulder Figure l isa fragmentary side elevation journals secured to the platiorm 5, a ot a conventional type of scoop excavator scoop '7 depending from the hoom ti and to provided with one form of my improved adapted to he'rnoved upon a trolley longitn :2 is a vertical longitudinal secdevices {Well-known) actuated by standard t v, upon an enlarged scale, ot a control levers mounted upon the pi attorni 5, r; \tll'ltllllt; drum and associated elements said scoop having a discharge ooor conforming g7 tures of my improved tripping trolled by a swinging latch 8, Mounted uromechan Fill, the section being taken in the on the platform 5 is a supporting trained-l plane indicated by the line llill, Figures Within the unper end of which is mounted a stationary transverse shaft 10 upon which 1 i a vertical transverse sectional ireeiyrotatahle calol-e drum il,

in the plane indicwed hy the line end oi" drum ll is formed with ,l igure f2; housingportion 12 Within Which is conis vertical cross sectional vievv tained a hand sprinoll connected at one end oi the up rcr end ot a scoop-control lever, it to the inner Wall of the housing 12 and upon a pin connected at the opposite end 15 to the stationary shaft 10. The housing 12 is provided with a removable cover plate 16. J ournalled within the frame 9 beneath the stationary shaft 10, and in parallel relation therewith, is a rock shaft 17 upon which is secured by means of a set screw 18 a bell crank 19 having arms 22 and 23. Surrounding the housing 12 is a brake band 20 whose opposite ends are pivotally secured as at 21 to the arms 22 and 23, respectively, of the bell crank 19. Keyed to one end of the rock shaft 17 is an arm 38 to which is pivotally and adjustably secured one end of a rod 37 whose other end is secured either to.a two-part disk 32, as shown in Figure 1, or to a two-part plate or Figure 5, said disk 32 or clamp 42 turning freely upon a pivot 25. 1

Referring particularly to Figures 1 and 4, I designate one of the control levers for actuating the scoop 7 by the ordinal 24. In this type of my improved mechanism, I have replaced one of the standard control levers for the scoop by the lever 24 and have organized this lever 24 so as to accommodate the control for my improved tripping mechanism and to allow for the operation of the same. The standard form of detent for the scoop-control lever has been replaced by the vertically reciprocable rod 26 normally held in its upper position by means of spring 26, this rod 26 being pivotally secured to an arm 26 which is pivoted intermediate its ends 26 mounted in the lever 24, the other end of this arm 26' being pivotally secured to a second rod 26 adapted to engage at its lower end with a notch segment 27. It is evident that normally the rod 26 is engaged withthe segment 27 and that the release of the same is necessary before the lever 24 can be actuated to move the scoop 7. Pivotally secured to the top of the lever 24 upon a pin 28 is a rocking handle 29 formed with a central chamber 29 intersected by a pin 51 upon which is pivoted intermediate its ends a link 52 to whose respective ends are secured an upwardly extending rod 30 and a downwardly extending detent member 53. The upper end of the handle 29 is closed by an externally threaded plug 66 having an upper soc'keted end 67 within the socket of which is mounted a spring 30" adapted normally .to hold the rod 30 in its upper'position. The lower endof the detent member 53 is adapted to engage notches 31 formed in the upper part of the lever 24. There are two of the notches 31 and they are spaced by a shoulder 68 of the lever 24, plainly shown in Figure 4. It is evident than that the spring pressed rod 3052 -53 normally locks the handle 29 to the lever 24. It is also evident that the depression of the rod 30 by the thumb of the operator against the pressure of the spring 30' will release clamp 42, as shown in the detent 53 from the notch. 31, (the handle 29 being in the position shown in full lines in Figure 4) and allow for the movement of the handle 29 to the position shown in dotand-dash lines, Figure 4. The amount 0 such pivotal movement of the handle 29 is limited by the construction of the notches 31 and the shoulder 68, as plainly shown in Figure 4, and the release of the pressure of the operators thumb from the rod 30 will again cause the locking of the handle 29 and the lever 24 in the position shown in dotand-dash lines, Figure 4, under the action of the spring 30.

The movement of the handle 29, relative to the lever 24, from the full line position shown in Figure 4 to the dot-and-dash position shown therein is designed to apply the brake band 20 to the drum 11. This result is effected in the following manner. Secured to an ofiset 35 formed upon the rocking handle 29 is the upper end of a rod 34 which is pivotally and adjustably secured to this offset 35 and is loosely pivotally connected at its lower end at a predetermine nected to the disk 32 at a point 36 remote from the point 33. It is evident that the rocking of the handle 29 with relation to the lever 24 will pull the rod 34 and thus through the train of mechanism hereinbefore described result in the rocking of the bell crank 19 and the clamping of the brake band 20.

Connected at one end to the latch f the scoop 7 is a cable 39 which extends rearwardly through a pulley block 60 and over a swivel pulley 59 supported upon the excavator and thence upwardly and is secured at its opposite end to the cable drum 11. Normally the brake band 20 is loose upon the cable drum 11. It will be a parent that as the scoop 7 is moved forwar ly along the boom 6, the cable 39 will unwind from the drum 11, the consequent turning movement of the drum 11 winding the spring 13. \Vhen the scoop 7 is retracted along the boom 6, the unwinding ofthe spring 13 will turn the drum in the" opposite direction effectively to wind up the cable 39. The nature of the connection between the lever 24 and thebell crank 19 is such as not materiall to effect the tightening ofthe brake ban 20 when the lever 24 is actuated. Therefore, when the rocking handle is d point 33 to the disk 32. The rod 37 is conlocked to the lever 24, the actuation of the actuation of the lever 24 to cause an additional forward movement of the scoop 7, the

cable 39 will be prevented from movm forvator frame and that in turn the boom 6 is 5 intermediate the drum 11 and the pivotally connected in a perpendicular plane to the boom support 64, so that the cable {39 block 60 1n many different directions on er various positions of the boom 6. To avoid wearing the cable 39, I provide the pulley block 60 furnished with a plurality of pulleys arranged in intersecting planes thus to furnish a rolling surfacefor the movement of the cable 39 in various directions. Particularly I provide two palrs of pulleys 61 and 62 respectively, mounted upon journal P 25 ins 63. One of these pairs 61 is-arranged in parallel relation in a horizontal plane and the other pair 62 arranged in parallel relation in a vertical plane. It is evident that ,whatever the direction of travel of the cable 39, a rolling surface will be provided for its travel through the pulley block 60. In order to direct the cable 39 into the pulley block 60, I provide an additional swivel'pulley 59 which in detail comprises a U-shaped hanger 57 dependentlysupported from the platftfirm P 5 block 60, tp the cross arm of which hanger 57 is secured a clevis 58 which passes through the eye of a small pulley block carrying a pulley 59 under which passes the cable 39,

. ling th e operation of said all as plainly shown in Figures 1 and 4.

When it'is desired to release the drum 11 from the brake band 20, the handle 29 is moved from the position shown in dot-anddash line, Figure 4, to the full line position shown therein. In order that the brake band 20 may bepositively pulled up from the drum 11, I secure to the outer upper surface of the band 20 one end of a spring 49 whose other end is secured to the angular end 48 of a vertical bar 47 secured at its lower end to the supporting frame 9.

lln the preferred type of tripping mechanism shown in Figures 5 and 9, I utilize the standardscoop-control lever 41 forming a part of the standard excavating mechanism. In order to accommodate my tripping mechanism, I reorganize this lever 41 only in the following particulars. I replace the pin upon which the detent 26 is ordinarily ivoted by a longer pin 54 and l drill the lever 41 to take a stop pin whose purpose will be hereinafter fully explained. As is well known, one type of standard scoop-control lever 41 is provided with a spring controlled arm 43 connected at its lower end to one end to the of a centrally pivoted link 55 whose other end is connected to the upper end of the do tent 26 adapted to engage at its lower end with the notched segment 27.

Mounted upon the'pivot 25 is a two-part clamp 42 to which is connected at the point 33 the rod 34 whose upper end is secured to the angular-extension 46 of a trip lever 46 which is pivoted between the portions 46 and 46 upon the pin 54. A spring 56 connected to the vmember 46 at one end and pivot 25 at the other end tends to hold the finger trip 46 normally in the position shown in Figure 5. This is an outer position of the finger trip 46 and the extreme position is determined and limited by the pin 70. It is evident that a finger or two of the same hand of the operator that -is used for actuating the lever .41 will serve be held in this inner position until the scoop 7 is moved forwardly to release the latch 8 and then the release of the trip 46 will permit the return of the same to its normal outer position shown in Figure 5.

What I claim is:

1. Tripping mechanism for excavator scoops comprising, in combination with the excavator and scoop and operatin means therefor including an actuating ever, a scoop-door retaining latch, a cable drum mounted upon the excavator, a cable connection between said latch and said drum, braking means for preventing'the rotation of said rum, means tending positively to rotate said drum to wind up said cable, and means unitary with said lever for controlbraking means.-

2. 'Pripping mechanism for excavator scoop'scomprising, in combination with the excavator and scoop and operating means therefor includin an actuating lever, a scoop-door retaining latch, a cable drum mounted upon the excavator, a cable connec-. tion between said latch and said drum, brakingd means for preventing the rotation of sai drum and drum shaft tending positively to rotate said drum to wind up said cable, and means unitary with said lever for control-e ling the operation of said braking means.

3. Tripping mechanism for excavator scoops comprising, in combination with the excavator and scoop and operating means therefor including scoop-door retaining latch, a cable drum mounted upon the excavator, a cable connecdrum, a coiled spring connected to said.

an actuating lever, a'

' pende'ntly of scoops comprising,

scoop-door retain ng latch', a cable drum mounted upon the excavator, a cable connection between said latch and said drum, 9.

brake band surrounding said drum, a coiled spring connected to said drum and drum 5 aft tending positively to rotate said drum to wind up said cable, means unitary with said lever for actuating said brake band, and means permitting said brake band actuating means to have a selective movement independent of said lever, the movements of the lever not affecting the brake band.

5. Tripping mechanism for excavator scoops comprising, in combination with the excavator and scoop and operating means therefor including an actuating lever, a scoop-door retaining -latch, a cable drum mounted upon the excavator, a cable connection between said latch and said drum, a brake band surrounding said drum, means tending positively to rotate said'drum to,

wind up said cable, and a finger grip member mounted upon said actuating lever and connected to said brake band, said grip member being operable by the same hand that 210- a limited selecof the lever, the affecting the tuates the lever and having tive movement independent movements of the lever not brake band.

6. Tripping mechanism for excavator scoops comprising, in combination with the excavator and scoop and operating means therefor including an actuating lever, a scoop-door retaining mounted upon the excavator, a cable connection between said, latch and saiddrum, a brake band surrounding said drum, means tending positively to rotate said drum to wind up said cable, a finger grip member pivotally mounted upon said actuating lever and connected to said brake band, said grip member being operable by the same hand that actuate-s the lever, the movements of the lever not affecting the brake band.

7 Tripping mechanism for excavator scoops comprising, in combination with the excavator and scoop and operating means therefor including an -actuating lever, a scoop-door retaining latch, a cable drum mounted upon the excavator, a cable connection between said latch and said drum, a brake band surrounding said drum, means tending positivel to rotate said drum to windup said ca le, a finger grip member pivotally mounted u on and ad acent the to of said actuating ever and connected to said brake band, the movements of the lever not affecting the brake band.

latch, a cable drum,

8. Tripping scoops comprising, excavator and scoop and operatin means therefor including an actuating ever, a scoop-door retaining latch, a cable drum mountedvupon the excavator, a cable connection between said latch and said drum, braking-means for preventing t drum means tending positively to rotate said drum to wind up sa1d-cable,a rock shaft mounted in the excavator frame, a bell crank secured to said shaft and having its two arms secured respectively to the ends of said brake band, a finger rip. member pivotally. mounted u on and adjacent the top of said actuating ever, and operating connections between said grip member and said rock shaft, the movements of the lever not affecting the braking means.

9. Tripping mechanism for excavator scoops comprising, excavator and scoop and operating means therefor including an actuating lever, a scoop-door retaimng latch, a cable drum mounted upon the excavator, a cable connection between saidilatch and said drum, braking means for preventing the rotation of said drum, means tending said drum to'wind up said cable,'a rock shaft mounted in the excavator frame, a bell crank secured to said shaft and having its two arms secured respectively to the ends of said brake band, a finger otally mounted upon and a said actuating lever, operating connections between said gri shaft, the pivota 1 member toward said braking means, and means for limiting the pivotal movement of said grip member away from said lever, latter not affecting the braking means.

10. Tripping mechanism scoops comprising, in excavator and scoop and operating means" scoop-door retaining mounted upon the excavator,

e rotation of said in combination with the member and said rock movement of; said gr p said lever tending toti'ghten mechanism for excavator in combination Wltll the positively to rotate rip member pivjacent the top of y j for I excavatorf; 1 combination with the: 1

119. v therefor including an actuating lever, a'fj latch, a cable dr-um a cable connec-' tion between said latch and said .d'rum,ia 1

brake band surrounding said cable drum,

in. meansv tending positively to lift said band from said drum, means tendingpositively to rotate said drum to wind up said cable,

means unitary with said lever for actuating v I said brake band, and means permitting said brake band actuating means to have a selective movement independently of said lever, the movements of the lever not affecting thebrake band.;

0 an I 11. Tripping mechanlsm for excavator scoops comprising, in combination with the excavator, a boom support connected therea boom connected to by a vertical ivot pin, tosaid support y a horizontal pivot pin, a' scoop supported by said boom, and operating '10s the movements of the 2 cable drum, means tending alacca means for said scoop including an actuating lever mounted upon said excavator, a scoopdoor retaining latch, a cable drum mounted upon the excavator, a pulley block secured to said boom support and having a plurality of pulleys arranged in intersecting planes, a cable connection between said latch and said drum, said cable connection passing through said pulley block so as to play over the several pulleys, a brake band surrounding said cable drum, means tending positively to rotate said drum to wind up said cable, and means for actuating said brake band, said latter means having a selective movement independent of said lever, the movements of the lever not affecting the brake band.

12. Tripping mechanism for excavator scoops comprising, in combination with the excavator, a boom support connected thereto by a vertical pivot pin, a boom connected to said support b a horizontal pivot pin, a scoop supporte by said boom, and operating means for said scoop including an actuating lever mounted upon said excavator, a scoopdoor retaining latch, a cable drum mounted upon the excavator, a pulley block secured to said boom support and having a plurality of pulleys arranged in intersecting planes, a cable connection between said latch and said drum, said cable connection passing through said pulley block so as to play over the several pulleys, a brake band surrounding said cable rum, means tending positively to rotate said drum to wind up said cable, means unitary with said lever for actuating staid brake band, and means'permitting said brake band actuating means to have a selective movement independently of said lever, the movements of the lever not affecting the brake band.

13. Tripping mechanism for excavator scoops comprising, in combination with the excavator, a boom support connected thereto by a vertical pivot pin, a boom connected to said support by a horizontal pivot pin, a scoop supported by said boom, and operating means for said scoop including an actuating levermounted upon said excavator, a scoopdoor retaining latch, a cable drum mounted upon the excavator, a pulley block secured to said boom support and having two pairs of respectively parallel pulleys whose axes lie in respectively perpendicular planes, a, cable connection between said latch and said drum, said cable connection passing through said pulley block so as to play over the several pulleys, a brake band surrounding said positively to rotate said drum to wind up said cable, means unitary with said lever for. actuating said brake band, and means permitting said brake band actuating means to have a selective movement independently of said lever,

the movements of the lever not afiecting the brake band. s

14. Tripping mechanism for excavator scoops comprising, in combination. with the excavator, a boom support connected thereto by a vertical pivot pin, a boom connected to said support by a horizontal pivot pin, a scoop supported by said boom, and operating'means for said scoop including an actuating lever mounted upon said excavator, a scoop-door retaining latch, a cable drum mounted upon the excavator, a pulley block secured to said boom support and having two pairs of respectively parallel pulleys whose axes lie in respectively perpendicular planes, a swivel pulley support and pulley therein mounted upon the excavator intermediate said cable drum and said pulley block, a cable connection between said latch andsaid drum, said cable connection passing through said pulley block so as to play over the several pulleys and also passing over said swivel pulley, .a brake band surroundin said cable drum, means tending positive y to rotate said drum to wind up said cable, and means for actuating said brake band, the latter means having a selective movement independent of said lever, the movements of the lever not affecting the brake band.

15. Tripping mechanism for excavator scoops comprising, in combination with the excavator, aboom support connected there to by a vertical pivot pin, a boom connected to said support by a horizontal pivot pin, a scoop supported by said boom, and operating means for said scoop including an actuating lever mounted upon said excavator, a scoopdoor retaining latch, a cable drum mounted upon the excavator, to saidboom support and having two pairs of respectively parallel pulleys whose axes lie in respectively perpendicular planes, a swivel pulley-support and pulley therein mounted upon said cable drum and said pulley block, a cable connection between said latch and said drum, said cableconnection passing said pulley block so as to play over the several pulleys and also passing over said swivel pulley, a brake band surrounding said cable drum,- means tending positively-to rotate said drum to wind up said cable, means unitary with said lever for actuating said brake band, band actuating means to have a selective movement independently of said lever, the movements of the lever not afi'ecting the brake band.

16. Tripping mechanism for excavator scoops comprising, in combination with the excavator and scoop and operating means therefor including an actuating lever, a scoop-door retaining latch, a cable drum a pulley block secured through.

and means permitting said brake I the excavator intermediate mounted upon the excavator, a cable connection betwen said latch and said drum, brakmeans for preventing the rotation of said drum, means tending positively to retate said drum to wind up said cable, a rock shaft mounted in the excavator frame, a bell crank secured to said shaft and having its twoarms secured respectively to the ends of said brakeband, a finger'grip member pivotally mounted upon and adjacent the top of said actuating-lever, operating connections between said grip member and said rock shaft, the pivotal movement of said grip member towards said lever tending to tighten said braking means, means tending positively to free said braking means from said drum, means tending ositively to move saidgrip member away rom said lever, and means for limiting the pivotal movement of said grip member away from said lever, the movements of the latter not affecting the braking means.

Signed by me this 23rd day of April, 1925.

GUY B. SCOTT. 

